Marrow is the spongy tissue where blood cell development takes place. 骨髓是一种海绵状组织，是血细胞发育的场所。
This involves suturing the skin edges together, and also placing sutures through each labrum, from one side to the other, creating thin lips of tissue. 这部分的手术包括将表皮边缘缝合，并在每片阴唇的两边都缝上线，制造出薄薄的唇状组织。
